Straightway valve.



No. 663,514. Patented Dec. u, |900.

.1. PowELL.

STRAIGHTWAY VALVE.

(Application filed May 8, 1899. Renewed May 5, 1900.)

No Model.)

FIG.2.

Tens PnorcxLn'Ho.. WASHINGTON u c Unruhen gratas PATENT Omron.

JAMES POWELL, OF CINCINNATI, OHIO, ASSIGNOR TO THE WILLIA POWELL COMPANY, OF SAME PLACE,

STRAIG HTWAY VALVE.

SPECIFICATION forming part of Letters Patent No. 663,514, dated December 11, 1900.

Application led May 8, 1899. Renewed May 5. 1900. Serial No. 15,646. (No model.)

T0 all whom, t vta/y concern:

Beit known that I, JAMES POWELL, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and. useful Improvements in Straightway Valves; and I do hereby declare the following to be a full, clear, and exact description of the invention, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to those straightway valves which include a pair of disks carried by a vibrating lever and capable of being forced against two opposing seats of an inclosing shell or casing when the lever is properly operated. In straightway valves of this class it has heretofore been the practice to cause the wedging device which forces the disks to their respective seats to act conjointly with the approach of the disks to their seats and force them with an undue amount of friction between their wearing surfaces. Conversely, when it is desired to open valves of this construction the joint friction of the wedge and bearing-surfaces of the disks and seats has to he violently overcome with much force and consequent injury to the wearing parts.

The object of my present invention is to insure an effective opening and closing of such disks, and yet to eliminate the element of friction, thus obviating the necessity of exerting much force. To accomplish this result, I provide the free end of the vibrating lever with a wedge, thinnest on its lower edge, and pivot the disks to independently-swinging links coupled to acommon pin projecting laterally from said lever at a point intermediate of its wedge and axis, as hereinafter more fully described.

In the annexed drawings, Figure lis a vertical section of my valve, taken at the line X X of Fig. 3, the free end of the lever being swung up, thereby elevating the disks and opening the uid passages or channels of the inclosing shell or casing. Fig. 2 is another vertical section of the valve taken at the line Y Y of Fig. 3, the lever being swung down so as to cause the disks to close the aforesaid duid-passages.

Fig. 3 is a sectionized plan of the open valve, a cap being removed from the inclosing shell, so as to expose the lever and disks. Fig. 4 is a transverse section of the closed valve, taken at the line Z Z of Fig. 2. Fig. 5 is a side elevation of one valve and its link separated from each other. Fig. 6 is an enlarged diagram illustrating the wedging action of the lever against the pivots of the closed valves.

A represents an inclosing shell or casing of a straightway valve, and B B are its connections or pipe ends, which pipe ends, as shown in Fig. 4, are traversed by' fluid passages or channels b h, terminating with annular seats C C'. These passages are axially in line with each other and communicate with the lower portion of a valve-chamber D, having duplicate guides E E E E on its opposite sides. Chamber D is closed by a readily-detachable cap F, secured in place by screws or bolts ff. (Shown only in section in Fig. 3.)

Adapted to be forced against the seats C C are disk valves G I-I, having short thick studs or pivots g h projecting laterally from their inner faces, the effective ends of these pivots being usually somewhat rounded, as more clearly shown in diagram 6. Again, these pivots are adapted to turn freely within circular bearings or eyes/L' fi', near the free ends of independently-swinging links I I, whose opposite ends are coupled to a common pin J, either passing transversely through or forming an integral part of the vibrating lever K. This point of suspension .I is located intermediate of the lever-axis and its wedge k, as more clearly shown in Fig. l. Usually the wedge forms a part of the lever, is narrower on its under side than at top, and extends a sufficient distance along said lever to effect the desired closing action of the disks GI-I. The axis of lthis lever is a squared portion Z of a rock-shaft L, to whose outer end is secured a handle or other operatingV device M.

In order to prevent the lever being secured too rigidly'to the rock-shaft, its squarel is smaller than the hole made in said lever for the reception of said square.

IOO

from said lever by means of their independent links I I and bringing the lower edges of said disks fairly above the tops of the iiuidpassages l) b'. Consequently a free and unobstructed flow is now afforded through the valve; but this iiow can be cut oft at any time by swinging the lever down about to the position shown in Fig. 2. Now owing to the angular manner in which the links are coupled to the lever K and disks G II, in conjunction with the guiding action of the vertical walls E E E E' of the shell or casing A, said disks arrive at their lowermost position and become stationary before said lever completes its descending stroke. Hence the closing oi the valves is eected without exerting much power; but as the lever approaches the limit of its swing the wedge 7c is forced in between the pivots g h, thereby driving said valves outwardly or away from each other and holding them tightly against the seats C C, although with a very small amount of friction. The valve will remain in this tightly-closed position until the lever K is again intentionally swung up by reversing the movement of the handle M, the first eiect of this swinging motion being to release the wedge k from contact with the pivots g h of the disks, thus causing the latter to readily collapse or approach each other before the ascending motion of said lever is exerted upon them. The

next effect of this swing of the lever is to cause the links I I to raise the now liberated disks and carry them up until they are again clearly above the tops of the fluid-passages `wedgedever adapted, to close or release said disks while they are at rest, substantially as herein described.

2. The combination, in a straightway valve, of an inclosing shell having a pair of fluidpassages b, b', a pair of valve-seats C, C', and a pair of duplicate guides E, E, E', E; a vibrating lever K ttedzwithin` said shell, and havingla wedge lo; a pair of links I, I', coupled to said lever, and having eyes t', z", near their free ends; and a pair of4 disk valves G, H, having, respectively, pivots g, h, traversing said eyes and adapted to be operated by said wedge, in the manner described, and for the purpose stated.

In testimony whereof I aiiix my signature in presence of two witnesses.

JAMES POWELL.

Witnesses J AMES II. LAYMAN, JOHN C. ROGERS. 

